Supporting and inclosing means for the driving-shafts of ammonia-compressors.



TLSHIPLEY.

SUPPORTING AND INCLOSING MEANS FOR THE DRIVINGSHAFTS 0F AMMONIA COMPRESSORS.

A'PPJLICATION nuzn MAY 28 um, 1-5;? Patented Dec. 11,1911.

' g 2 SHEETS-*SHEET I.

T. SHIPLEY.

SUPPORTING AND lNCLOSlNG MEANS FOR THE DRI VI NG SHAFTS 0F AMMONIA COMPRESSORS.

APPLICATION FILED M-AY28.1917.

1,259,037. Patented Dec. 11, 1917 2 SHEETS-SHEET 2.

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COMPB-ESSOBS.

Specification of Letters Patent.

Patented Dec. II, 19%,

Application filed May 28, 1917. Serial No. 171,429.'

To all whom it may concern:

Be it lmown that I, THOMAS SHIPLEY, a citizen of the United States, residing in the city of York, in the county of York and State of Pennsylvania, have invented a new and useful Improvement in Supporting and Inclosing Means for the Driving-Shafts of Ammonia-Compressors, of which the following is a specification.

My inventlon relates to ammonia compressors for use in ice and refrigerating,

machinery, and more particularly to confpressors of the inclosed type so called that is to say a compressor in which the compressor cylinders are erected upon a base known as the crank case which constitutes a chamber for reception of the crank shaft and its connections by which the compressor cylinder pistons are driven, the ends of the compressor cylinders which rest upon the crankcase being open and in free communication with the interior of said case, thus permitting a direct connection of the crank shaft with the cylinder pistons. In order to prevent the suction gas, which is llable to leak downward in small quantities around the pistons into the crank case below, from escaping therefrom into the surrounding air, as well as to prevent the oil used in the oiling system of the compressor, and usually contained in the base of the crank case as a reservoir, from splashing out therefrom, it is necessary to close all openings in the crank case tightly and securely to prevent the'escape of the ammonia fumes as well as to maintain a proper pressure in the crank case, particularly when the oiling system involves the forced circulation of the oil through a pipe line under pressure, in a closed circuit completed through the crank case as described by me in another application for Letters Patent now pending 111 the U. S. Patent Ofice. My invention has to do with the closure for that opening in the crank case through which the crank shaft passes out from the case, and it consists in an improved combination and arrangement of instrumentalities for efiectively maintaining a tight joint at that point notwithstanding changes in the alinement of the shaft due to the wearing down of the bearings or to other causes, which can best be explained in connection with the accompanying drawings forming part of this specification to which I shall now refer for a better understanding of my invention.

In the drawings Figure 1 is a longitudinal vertical central section of so much of an ammonia compressor embodying my improvement in its preferred form as needed for the purposes of explanati0n the section being in the vertical plane of the axes of the crank shaft and the compressor cylinders, the crank shaft and some of the other parts being in elevation.

Fig. 2 is a transverse vertical section of the crank case taken near the end of the same out through which the crank shaft passes. In this figure the view is of the crank case alone with the compressor cylinders and crank shaft removed. The crank case is in section so as to expose the adjoining crank shaft bearing which, together withits seat or supporting base, is in elevation.

In the drawings A is the crank case with side and end openings all of which, except that which is at the end of the case out through which the crank shaft extends, are closed by solid imperforate covers a, between which and the crank case gaskets b of suitable soft material are introduced as packing for the joint between them. B are the compressor cylinders erected on the crank case, and communicating at their open lower ends with the interior of the same. C is the crank shaft; D are the bearings for the same; E are the seats or supporting bases for the bearings; and F are the connecting rods between the pistons B of the cylinders, and

. the cranks on the crank shaft.

The cover G for the opening at the end of the crank case out through which the crank shaft extends is, like the other covers a, tightly bolted to the crank case, and has a packing gasket 6 interposed between it and the annu ar border of the opening which it closes so as to make a gas tight joint therewith. The cover however, is not imperforate like the other covers, but is formed with a central circular opening 9 for the passage of the crank shaft. which opening, as shown, is concentric with the crank shaft, but of noticeably greater diameter than the shaft, so as" to leave between the cover and the shaft quite a wide annular open space.

I? this space is located a stufing box H,

I to

whose body b, which contains the packing, encircles the shaft, and whose outer flanged end or head it overlaps, and fits closely against, the portion of the cover bordering the opening, which portion serves as a seat against which the flange may be tightly held by screw studs 70; an annular follower Z for compressing the packing encircles the shaft and 18 secured to the head of the stufing box by screw studs m, by means of which the follower can be caused to increase pressure upon the packing in the stufing box as desired.

The body it of the stug box is of less diameter than the opening in the cover thus leaving between the body of the stg box and the border of said opening an annular clearance or sace n. The holes in the head it of the stu t. box H, through which pass screw studs k by which. it is secured to the cover G, are of sufiiciently greater diameter than the stems of the said studs to leave anannular clearance or, space 0 around the stem of each stud which may be of the same width changes which may from time to time =occur masons? in the alinement of the crank shaft and to the wearing down of the shaft bearings by continued frictional contact with the shaft,

type, the combination substantially as herein before set forth of the crank shaft and bearings therefor; the crank case in which the same are housed; a cover for the open end of the crank case through which the crank shaft extends having a circular opening for the passage of said shaft of greater diameter than the shaft leaving an annular clearance or open space between the shaft and cover; a stufing box encircling the shaft and provided with a head which overlaps the portion of the cover that borders the opening therein, and is adjustable crosswise of said opening, to conform the stufing box to changes in alinement of the shaft; and

means for tightly securing the stufling box to the cover in its adjusted position.

In testimony whereof ll hereto a my signature.

THO MAS SHIJPLEY. 

